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    <title>Document</title>
    <style>
        table {
            border: 1px solid #555;
            width: 510px;
            margin: 120px auto;
        }
        th,td {
            border: 1px solid #111;
            text-align: center;
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    <div id="app">
        <table>
            <caption>欢迎光临_vue开发的收银系统_水果店</caption>
            <tr>
                <th>苹果10￥/斤，折扣&lt;8折&gt;</th>
            </tr>
            <tr>
                <td>请输入你要购买的斤数<input v-model="count" type="number"></td>
            </tr>
            <tr>
                <td><button @click="total = count * 10">结账买单~</button></td>
            </tr>
            <tr>
                <td>结账单：总价：{{ total }}￥元  折后价：{{ total * .8 }}￥元  省了：{{ total * .2 }}￥元</td>
            </tr>
        </table>
    </div>
    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: '#app',
        data () {
          return {
            count: 0,
            total: 0
          }
        },
        methods: {}
      })
    </script>
  </body>
</html>
